CVE-2020-10824 : Exploit Details and Defense Strategies

A stack-based buffer overflow vulnerability in /cgi-bin/activate.cgi through the ticket parameter on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to execute code via a remote HTTP request.

Understanding CVE-2020-10824

This CVE identifies a critical security issue in Draytek networking devices that could lead to remote code execution.

What is CVE-2020-10824?

The vulnerability arises from a stack-based buffer overflow in the mentioned Draytek devices, enabling malicious actors to exploit the /cgi-bin/activate.cgi script through the ticket parameter.

The Impact of CVE-2020-10824

The exploitation of this vulnerability could result in remote attackers executing arbitrary code on the affected Draytek Vigor3900, Vigor2960, and Vigor300B devices, compromising their security and integrity.

Technical Details of CVE-2020-10824

This section delves into the specifics of the vulnerability.

Vulnerability Description

The stack-based buffer overflow in /cgi-bin/activate.cgi on Draytek Vigor devices allows threat actors to achieve code execution by sending a crafted HTTP request.

Affected Systems and Versions

Draytek Vigor3900, Vigor2960, and Vigor300B devices before version 1.5.1 are vulnerable to this exploit.

Exploitation Mechanism

Remote attackers can trigger the vulnerability by sending a malicious HTTP request to the affected devices, exploiting the buffer overflow to execute arbitrary code.

Mitigation and Prevention

Protecting systems from CVE-2020-10824 requires immediate action and long-term security measures.

Immediate Steps to Take

Update the Draytek devices to version 1.5.1 or later to mitigate the vulnerability.
Implement network segmentation to limit the impact of potential attacks.

Long-Term Security Practices

Regularly monitor and audit network traffic for suspicious activities.
Educate users on safe browsing habits and the importance of cybersecurity awareness.

Patching and Updates

Stay informed about security advisories from Draytek and promptly apply patches and updates to address known vulnerabilities.